diff options
| author | Austin Clements <austin@google.com> | 2019-04-19 15:56:37 -0400 |
|---|---|---|
| committer | Austin Clements <austin@google.com> | 2019-04-22 16:01:16 +0000 |
| commit | 744fcfec4e94d9585d2be6f9efae8480a2f2fc8d (patch) | |
| tree | 93dba80aa5db09882122dfc6831613635aca6dc5 | |
| parent | fe1afe8d4ca06c56f583a9296282697f39d27d97 (diff) | |
| download | go-744fcfec4e94d9585d2be6f9efae8480a2f2fc8d.tar.xz | |
runtime: improve mstart comments
Some of the comments were unclear or outdated.
Change-Id: I02e01bf60def0074c1fa760e94aa992e9e4969b9
Reviewed-on: https://go-review.googlesource.com/c/go/+/172987
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
| -rw-r--r-- | src/runtime/proc.go | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/src/runtime/proc.go b/src/runtime/proc.go index 30ddeadff5..57ad17d594 100644 --- a/src/runtime/proc.go +++ b/src/runtime/proc.go @@ -1125,7 +1125,7 @@ func startTheWorldWithSema(emitTraceEvent bool) int64 { return startTime } -// Called to start an M. +// mstart is the entry-point for new Ms. // // This must not split the stack because we may not even have stack // bounds set up yet. @@ -1150,9 +1150,11 @@ func mstart() { _g_.stack.hi = uintptr(noescape(unsafe.Pointer(&size))) _g_.stack.lo = _g_.stack.hi - size + 1024 } - // Initialize stack guards so that we can start calling - // both Go and C functions with stack growth prologues. + // Initialize stack guard so that we can start calling regular + // Go code. _g_.stackguard0 = _g_.stack.lo + _StackGuard + // This is the g0, so we can also call go:systemstack + // functions, which check stackguard1. _g_.stackguard1 = _g_.stackguard0 mstart1() |